If you never managed to get a hold of the pre-order items for Fallout: New Vegas or are simply looking for some all-new weaponry to bring more carnage to the Mojave Wasteland, you'll be happy to hear that the game's Courier's Stash and Gun Runners' Arsenal add-ons are now available on Steam (here and here) and the Xbox Live Marketplace (here and here), with the PlayStation Network version hitting later today. A quick summary of the two:

Courier's Stash (Xbox LIVE for 160 Microsoft points, PlayStation Network and Steam for $1.99) gives players immediate access to four content bundles previously available only through pre-ordering Fallout: New Vegas. The Caravan Pack, Classic Pack, Mercenary Pack and Tribal Pack each offer unique weapons, apparel and aid advantages that will help you throughout your journey.

Gun Runners' Arsenal (Xbox LIVE for 320 Microsoft points, PlayStation Network and Steam for $3.99) increases the range of unique weapons, weapon mods, ammo types and recipes waiting to be uncovered in the vast Mojave Wasteland.